林区公路设计中容许弯沉值的计算分析

目前,林区公路大多为就地取材的中、低级路面,因而结构设计很少,而厚度设计则是主要的内容。在厚度设计中,是根据对公路整体强度的要求来确定各结构层厚度的,确定的依据就是路面容许弯沉值。一、容许弯沉值及其计算公式容许弯沉值指标一般应在大量调查的基础上,根据林区公路的现状和可能的条件,考虑林业经济发展对林区公路将来的要求,而提出相应的数值。国内外通过大量的调查试验和研究,认为容许弯沉值主要由交通量数值确定。一般来说,等级越高的公路,通过的交通量也越大,但考虑到不同等级公路的不同的要求,不完全是体现于交通量;同时现在采用的路面类型越来越多,不同类型的路面对变形有不同的适应能力,如目前较多采用的

CALCULATION AND ANALYSIS ON THE ALLOWABLE REBOUND DEFLECTION FOR DESIGN OF FOREST HIGHWAY

The allowable rebound deflection is main criteria for pavement design offorest highway. The peper analyses the each coefficient and calculated formulaof the allowable rebound deflection. Based on results surveying highway andtest ug data at home and abroad, and thinking over the conditions of foresthighway the author puts forward a suggestion value of grade coefficient ofhighway to calculate the allowable rebound deflection. It is also carried on asolution of pavement thickness calculation with the suggested grade coefficient.This article showed that it is possible to achieve a larger reliability for desig-ning forest highway with the suggested coefficient.